CALS is the abbreviation for Continuous Acquisition and Lifecycle Support. This expression was defined by the US Department of Defense (DoD) and stands for standardization of documentation. The standards define CALS Raster as the format for raster files.

Scanned images can be stored in the CALS Raster format and further edited in other programs. CALS Raster is a pure pixel-based format, i.e. when exporting to CALS Raster, all the elements drawn in Arbortext IsoDraw are converted into a raster image.